American Baby Company Organic Cotton Quilted Crib & Toddler Crib Size Fitted Mattress Pad Covers, Natural (1) Face:100% Cotton; Middle: 100% Polyester; Back: 100% Waterproof Polyester Top layer-100% Organic Cotton interlock; Middle layer: 100% Breathable polyester; Back layer-Waterproof/Breathable Polyester 28 inches by 52 inches